Knuckle joint press



April 18, 1961 A. H. SCHLOZ ETAL KNUCKLE JOINT PRESS 4 Sheets-Sheet 1 INVENTORS ANTI- UR H.SCHLOZ 8| NORMAN O. STEELE Filed Oct. 20, 1958 S I BY I ATTQRN April 1961 A. H. SCHLOZ ETAL 2,979,975

KNUCKLE JOINT PRESS 4 Sheets-Sheet 5 Filed Oct. 20, 1958 FIG. 3

INVENTORS ARTHUR H. SCHLOZ 8| NORMAN O. STEELE BY 4 AT QRNEYS shaped and tapered gibs 72 as shown in Figure 6. Two

. gibs are provided one on each side of the wedge, and they are adapted to ride in matching slots formed in the respective sub-frame 60 and the slide 22'. The gibs are seated in recesses of the wedge, such recesses being longer than the gibs so the latter may be adjusted lengthwise of the wedge from time to time to take up wear. To this end theparts' are bolted together through lengthwise widened holesin the gibs and shims may be provided to take up any clearance at the ends of the recesses.

Referring now to Figure 3, the upper and inclined channel portion of the gib is shown as riding in a slot formed in the depending part of the adjacent subrframe 60; Likewise, the lower channel portion of the 'gib, parallel with the bottom of the slide, is shown as riding in a corresponding slot in a block 73 secured by bolts 74 to the slide. be evident that if the wedge 70 is moved toward the left to the dotted line position shown in Figure 3, the gibs will move the subframe 60 and the slide 22 farther apart than, appears in that figure. On the other hand, when the wedge 70 is returned toward the right from the assumed dotted line position, it will draw the corresponding slots of the sub-frame 60 and 22 closer together. Any adjusted position desired between these two points may be obtained by motion of the wedge back and forth.

Thus, the wedge 70 and its gibs 72 act both to con-,

nect the slide 22 and sub-frame 60 with its toggle mechanism together and also to permit adjustment between the slide and sub-frame.

As stated, the wedge 70 shown at the right-hand side of Figure 3 is like the construction just described except that it is reversed in the position of the tapers.

by the wedges as they are adjusted and moved in opposite directions, which would not be the case if the angle of the tapers were parallel with each other.

To move the wedges in and out, and adjust the slide and sub-frames thereby, a' reversible driving motor 80 is provided, as shown in Figures 2 and 3, that operates through a gear box 81 to drive a sprocket wheel 82.

This sprocket wheel carries a sprocket chain that, as'

shown in Figure, 2, drives a gear 83 secured to a shaft 85 (Figure 3) extending across and journaled in the slide, 22 As best shown in Figure 4, the shaft 85 is,

in turn, provided with two sprocket wheels 86 and87 that, through sprocket chains 88 and 89, drive identical sprocket wheels (one of which is shown at 90 in Fig-- ure 3) keyed to shafts, or screws journaled at 92 in'the slide 22.

Here again, only one sprocket wheel 90 and associated elements will be described, in connection with one wedge 70, because the parts are identicalfwith one exception. The shaft or screw is threaded, as shown in Figure 3, and engages a nut 93 locked against rotation in the wedge 70. Thus, as the sprocket wheels 90 are driven by the motor 80, and the screws rotated, the effect is to push the respective wedges back and forth in the slide 22. The threading on the nut and screw for the wedge 70 on the right-hand side of Figure 4 is reversed from the threading on the left-hand wedge. Thus, as. the motor 80 is driven, and the drive transmitted through the gear box 81 to the shaft 85 in one direction of rotation of the motor, the wedges 70 push apart from each other and move toward the outsides of the slide 22.

by. the slide adjacent the shaft 102 and positioned on From the description thus far, it will' This reversal. of taper provides uniform application of thrust opposite sides of a nut 105 carried by the screw 102 and restrained against rotation. Thus, as the screw ing to the movement of the wedges.

102 rotates, the nut will traverse the same, correspond- If the motor 80 is "driven to a point where damage to the wedges is 'likely, then the nut 102 will contact one of the limit switches and cut off the current to the motor. For

instance, if the wedges are approaching each other, then -(Fig'ure 2) cutting olf the current to the motor. the other hand, if the wedges are separating and apthe nut 105 will finally contact the left-hand limit switch proaching a point where the parts of the sub-frame and wedge may. become damaged, contact will be made between the nut and the right-hand limit switch again to In operation-of the invention, dies are secured in the usual manner-to the bolster of the press and to the under face'of the slide, and the press is turned over slowly unitl the dies approach each other. Then final adjustme'nt of the dies and of the stroke of the slide 22 is accomplished through use of the wedges 78. Thus, if the wedges are in their outer-most position, the slide at bottom of downstroke will be spaced farther from the bolster than would be the case if the wedges were in their innermostposition. The wedges are moved until the dies register properly with. each other, and they are then locked in this position by stopping the motor 80, and the press is ready for use.

g It is.to be understood that while only one embodiment of the invention is shown herein, it is by way of example only and isv not to be construed in. a limiting sense. The invention may be incorporated in other types of presses than. that shown although it is particularly well adapted tocoining presses andthe like that have a short stroke anddevelop great power. Other arrangements and modifications will occur to those skilled in the art and may be resorted? to without departing from the scope of the invention.

We claim:

1. In a press, a frame including a crown, a bed and a slide. with a die supporting face mounted in said frame between said bed and crown, and eccentric shaft carried 'by.said crown, power means to rotate said eccentric, a

pair of journals carried on the underside of said crown with their axes. parallel to the axis of said eccentric shaft and on,opposite sides thereof, toggle links posit oned to engage respective crown journals, two sub-frames carried in said slide and adapted to provide journals for the lower ends of said toggles respectively, each of said toggles comprising two elements pivotally connected adjacent their mid-points, a sub-slide interposed between said toggles, a link pivotally connecting said sub-slide with the pivotal connection of each of said toggles, a pitman member connecting said sub-slide with said eccentric such that rotation of said eccentric opens and closessaid togglesto raise and lower said slide, a wedge interposed between each of said sub-frames and said slide, and serving as the connecting link to secure each of said subframes to said slide, a threaded member secured to one of said sub-frames and rotatably mounted in said slide, a second threaded member engaging said other sub-frame and rotatably mounted in said slide and threaded opposite to the threading of said first threaded member, and power means to rotate said threaded members in unison and adjust the position of said wedge elements to vary the position of said die supporting face withrespect to said bed.

,2."In a press, a frame including a crown, a bed and a slide with a die supporting face mounted in said frame between said bedand crown, an eccentric shaft carried by said crown, power means to rotate said eccentric,.

and on opposite sides thereof, toggle links positioned to engage respective crown journals, two sub-frames carried in said slide and adapted to provide journals for the lower ends of said toggles respectively, each of said toggles comprising two elements pivotally connected adjacent their mid-points, a sub-slide interposed between said toggles, a link pivotally connecting said sub-slide with the pivotal connection of each of said toggles, a pitman member connecting said sub-slide with said eccentric such that rotation of said eccentric opens and closes said toggles to raise and lower said slide, a wedge interposed between each of said sub-frames and said slide, and serving as the connecting link to secure each of said subframes to said slide, a threaded member secured to one of said sub-frames and rotatably mounted in said slide, a second threaded member engaging said other sub-frame and rotatably mounted in said slide and threaded opposite to the threading of said first threaded member, a shaft member parallel to the axes of said threaded members and spaced therefrom, driving connections from said shaft member to each of said threaded members, and power means to drive said shaft and thereby rotate said threaded members in unison and adjust the position of said wedge elements to vary the position of said die supporting face with respect to said bed.

3. In a press, a frame including a crown, a bed and a slide with a die supporting face mounted in said frame between said bed and crown, an eccentric shaft carried by said crown, power means to rotate said eccentric, a pair of journals carried on the underside of said crown with their axes parallel to the axis of said eccentric shaft and on opposite sides thereof, toggle links positioned to engage respective crown journals, two sub-frames carried in said slide and adapted to provide journals for the lower ends of said toggles respectively, each of said toggles comprising two elements pivotally connected adjacent their mid-points, a sub-slide interposed between said toggles, a link pivotally connecting said sub-slide with the pivotal connection of each of said toggles, a pitman member connecting said sub-slide with said eccentric such that rotation of said eccentric opens and closes said toggles to raise and lower said slide, a wedge interposed between each of said sub-frames and said slide, and serving as the connecting link to secure each of said subframes to said slide, a threaded member secured to one of said sub-frames and rotatably mounted in said slide, a second threaded member engaging said other sub-frame and rotatably mounted in said slide and threaded opposite to the threading of said first threaded member, and power means to drive said shaft and thereby rotate said threaded members in unison and adjust the position of said wedge elements to vary the position of said die supporting face with respect to said bed and adjustment means independent of said power means carried by at least one of said wedges to permit bodily displacement of said wedge with respect to the other wedge and thereby maintain the wedge surfaces in a synchronized cooperating position.

References Cited in the file of this patent UNITED STATES PATENTS 518,847 Leavitt Apr. 24, 1894 2,038,795 Klocke Apr. 28, 1936 2,085,648 Glasner June 29, 1937 2,113,115 MacMillin Apr. 5, 1938 2,320,103 Seidel May 25, 1943 2,780,117 Bauer Feb. 5, 1957 FOREIGN PATENTS 1,129,041 France Sept. 3, 1956 

